Water quality studies of Hoskerehalli lake of Bangalore, Karnataka

The aim of the current study was to evaluate the status of the Hoskerehalli lake water with respect to different physicochemical parameters [pH, temperature, total dissolved solids (TDS), turbidity, electrical conductivity (EC), total hardness (TH), alkalinity, dissolved oxygen (DO), biological oxygen demand (BOD), chemical oxygen demand (COD), phosphate, sulphate, nitrate and potassium] during the year 2005. These parameters were compared with water quality standards to indicate probable pollution. However, the overall water quality of the lake remained within the safe limits throughout the study period. Correlation coefficient matrix between each parameter were estimated to throw light on relationship between different physicochemical parameters under investigation, few parameters like pH - temperature (r = 0.712), TDS - turbidity (r = 0.800), TDS - conductivity (r = 0.988), turbidity - conductivity (r = 0.781), temperature - alkalinity (r = 0.822), sulphate - potassium (r = 0.724) showed good positive correlation. The lake water quality is good and fit for irrigation and fish culture purpose.